Switch for electrical apparatus.



No. 733,146. PATENTED JULY 7, 1903. E. R. CARICHOFF.

SWITCH FOR ELECTRICAL APPARATUS.

APPLICATION FILED AUG. 1, 1901.

N0 MODEL.

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Eu; m E. Garz'akoff' w: wonms PETERS co. FHnYO-LITHO, wAsmuumN, 04 cUNITED STATES Patented July 7, 1903.

PATENT OFFIQE.

EUGENE R. OARIOI-IOFF, OF EAST ORANGE, NEW JERSEY,'ASSIGNOR TO SPRAGUEELECTRIC COMPANY, A CORPORATION OF NENV JERSEY.

SWITCH FOR ELECTRICAL APPARATUS.

SPECIF CAT N forming part of Letters Patent N 0. 733,146, dated July 7,1903.

Application filed August 1, 1901. Serial No. 70,518. (No model.) 7

To all whom, it may concern:

Be it known that I, EUGENE R. CARICHOFF, a citizen of the United Statesof America, and a resident of East Orange, in the county of Essex andState of New Jersey, have invented certain new and useful Improvementsin Switches for Electrical Apparatus, of which the following is aspecification.

The present invention relates to switches for electrical apparatus, theobject of the same being to improve the general construction and renderthe same fireproof. IIeretofore the methods of protecting apparatus,such as controllers and reversers, for the switching of heavy currentsfor car use have not been of such a nature as to afford adequate safetywhere compact design was used. This invention meets the requirement.

The invention consists of certain features of construction andcombinations of parts to be hereinafter described and then claimed.

In the accompanying drawings, Figure I is a longitudinal sectional frontview showing the improved construction of controller, the section beingon the line x 00 of Fig. 3. Fig. 2 is a plan view of the device with thecover removed; and Fig. 3 is a transverse section on line 1] y, Figs. 1and 2.

The casing A of the controller has a slate back. a, through which arepassed a number of studs 13, the inner ends of which are formed withenlargements I), that abut against the inner wall of the slate back andform the bases for the spring contact fingers or brushes O. The outerprojecting ends of the studs are screw-threaded to receive locking-nutsd d, that secure the terminals for the various circuits and which, asthe connection is made outside the casing, removeall possibility of arcscommunicating to car-wiring. This disposition of studs also securesvertical insulation.

The shaft of the cylinder E is journaled, as usual, in the casing andcarries the contacts 6, arranged in well-known manner to make contactwith the fingers 0, all surfaces of the controller-cylinder except theactual working contacts being covered with insulation. The innersurfaces of the casing are well covered with sheet insulation to, whilethe casing is transversely partitioned off by insulation-plates F E Ewhich provide compartments to'isolate the contacts, plate F, however,not entirely closing the spaces on each side from each other, so thatair may pass from one space to the other. Middle partition F rests upona horizontal plate or air-deflector F and this in turn rests upon a lowvertical plate or air-deflector F located on the bottom of the casingbetween openingso o therein,from which extend downwardly-extendingoppositely-presented elbow-funnels g g. In this Way horizontal airchutes or channels g g are formed, which in connection with the funnelsg g no matter in which direction the car may be moving act to cause acircuitous current of air, and thereby thoroughly ventilate the interiorof the casing and keep the parts as cool as pos* sible. Blow-out coil IIis isolated and separated from the working contacts by the partition FCover I of the casing ishinged at its rear edge to the back of the sameand is formed at its edges with a depending flange i, which when thecover is closed embeds in packing j, located in the groove of a gutterj,extending along the outer upper portion of the easing. Attached to theunder side of the cover are the heat-conducting separations K forchilling the arc and made of reconstructed granite. By this constructionthe separations K are moved out of the casing simultaneously withraising of the cover.

What I claim as new, and desire to secure by Letters Patent, is

1. In a switch for electrical apparatus, the casing provided withpartitionsforming com partments to isolate the contacts, substantiallyas described.

2. In a switch for electrical apparatus, a casing having a side ofinsulating material, and studs for the terminals, said studs extendingthrough said side and having at the inner ends abutting enlargements orshoulders for the contact-fingers, the other ends projecting forattachment of the terminals; substantially as described.

3. In a switch for electrical apparatus, the casing and a hinged coveron which are mounted the heat-conducting separations for chilling theare, substantially as described.

4. In aswitch for electrical apparatus, the casing provided with twoventilating-openings, and means for causing, through one or Ihe other ofsaid openings, according :to the direction of movement of the vehicle acontinuous circulation of air in the casing, suhg stantially asdescribed. 1

'5. In a switch forelectrical apparatus, the l casing provided with twoventilating-open I ings, a deflector arranged above the open- 10 ings,and a deflector between the openings, substantially as described.

Signed at New York city, :New York, this 31st day of July, 1901.

EUGENE R. CARIOHOFF. Witnesses:

GEO. L. WHEELOOK, SAMUEL W. BALCH.

